If there is no PFS-specific rule (either disallowing what's normally allowed, or allowing what's normally disallowed) then there isn't really any reason to start a discussion within the PFS forums: questions resolving around the standard rules belong in the Rules Questions forum... Otherwise every single Rules Question thread should also belong in the PFS forum.

The PFS FAQ does specifically confirm that Cross-Blooded does not work with Wildblooded Archetype, although that also isn't a PFS-specific ruling, just the same RAW rationale that applies to Tattooed/Cross-blooded (or Tattooed/Wildblooded):

This combination is allowed per RAW and PFS. The cross blooded sorcerer does not replace the bloodline power gained it lets you pick between two. The Tattooed Sorcerer then replaces the first and 9th powers gained so they do not overlap just you won't benefit from your 1st or 9th bloodline power. However the cross-blooded archetype is pretty weak because of the loss of spells so unless your build completely relies on the arcana gained I would skip the archetype all together

Kaisc006, the rule isn't that it just replaces features, its replace or alter features. Because the crossblooded alters how bloodline powers work, the tattooed sorc then replacing them causes them to be incompatible for combination.

Kaisc006, the rule isn't that it just replaces features, its replace or alter features.

Hmm could you point out this ruling? All I see is that archetypes are incompatible only when it replaces a given ability. Otherwise the Qinggong monk who can replace so many abilities would be incompatible with many, if not all, monk archetypes.

Yes, but the Devs states that the Qinggong monk doesn't count as doing so. The ruling on sorc archetypes is in the PFS FAQ.

Yeah I deleted the last post cause I saw it on pfsrd. Lame and confusing they FAQ'd it only for the Qinggong monk because it's doing the exact same thing as a Crossblooded sorcerer. If it was the devs intention that every monk be a Qinggong monk then I guess that's ok.

Well like I quoted/posted, there is a FAQ directly stating Crossblooded isn't compatable with Wildblooded.
The only coherent explanation of that FAQ is that Crossblooded's modifications to class abilities
are mutually incompatable with other Archetypes that modify/replace those abilities.
I'm not sure why anybody would think that changing Wildblooded to another Archetype (that still overlaps with Crossblooded) would be any different.

IMHO, Paizo sees Qi-Gong as less of an actual monolithic archetype, but rather a collection of Archetypal Modifications, ALL of which are optional... Thus Qi-Gong as an archetype isn't really defined before you make your choices. Note how the Ki Power replacement is worded:
"A qinggong monk can select a ki power (see below) for which she qualifies in place of the following monk class abilities... This replaces the monk class ability the qinggong monk gives up for this ki power."
Qi-Gong's ability replacement only occurs if you choose to, i.e. as you define your own custom Qi-Gong Archetype.

In contrast, Cross-Blooded is worded as:
"Bonus Feat: A crossblooded sorcerer combines the bonus feat lists from both of her bloodlines and may select her bloodline bonus feats from this combined list.
Bloodline Powers: At 1st, 3rd, 9th, 15th, and 20th levels, a crossblooded sorcerer gains one of the two new bloodline powers available to her at that level. She may instead select a lower-level bloodline power she did not choose in place of one of these higher-level powers."
So no matter what, the abilities DO work differently (expanded Feat list, selection of powers between bloodlines and from previous levels), even if the 'end result' may be the same as the vanilla Bloodline, you partook of 'modified class ability' means to arrive at that point. Not fundamentally different than Tattooed Sorceror combined with Arcane Bloodline, which replaces a potential choice of a Familiar... with a Familiar. That's still modifying the ability even though the end result is still potentially the same.

They work the same in that a cross-blooded sorcerer could pick all the same feats/ bloodline powers as his "normal" bloodline and a Qinggong monk could pick all the same monk powers as a "normal" monk. Of course the cross-blooded gets an additional bloodline arcana but that's not subject to the debate here because it's a new ability that doesn't replace/modify anything.

I agree though that Qinggong per this FAQ is not an archetype simply more options for a monk. If they didn't intend for it to be an actual archetype they probably should have listed it in the beginning of the archetypes section as additional monk abilities or something similar to additional options for ranger fighting styles or rogue talents.

As far as wildblooded sorcerers are concerned, it's unfortunate they're listed as archetypes and therefore subject to these rules and not in similar fashion to subdomains because they work the same mechanically.

Crossblooded sorcerer does not state anywhere what it modifies or replaces at all! Therefor anyone that claims the RAW states one thing or the other is wrong. It is undefined.
The devs have made an arguement that getting a second bloodline arcana is modifying the ability... As well as additional class skills could be reasoned similiarly.
Tattooed sorcerer does not interfere with class skills or bloodline arcana and everything else is optional so at the moment they are compatible.

I think they are compatible. Unless Tattoo came out later than the FAQ (which doesn't seem likely) I think they would have addressed this in the FAQ. There are not a lot of sorcerer archetypes to address in regards to Crossblooded. I think their silence on the matter is telling since the crossblooded was addressed.

I am one of the people who believes that by RAW the crossblooded sorcerer expands on the options one can choose with the class ability rather than alters the class ability. I think Crossblooded creates a hybrid bloodline - simply that, a hybrid bloodline.

As quoted by Quandry above, the crossblooded "combines the bonus feat lists from both of her bloodlines and may select her bloodline bonus feats" Emphasis should be on "may select _her_ bloodline bonus feats" as in bonus feats granted by the sorcerer class unaltered. That is the way all the powers work.

Just a note - I find it curious and a bit disappointing that so many would make a huge exception for the Quinggong monk (including the dev's) and pass it off as just an exception to the rules they are happy to see, but then get uber strict with something that has genuine ambiguity in regards to interpretation, more so than the Qinggong monk.

Amenhotep -
Please follow James McTeagues link in his post above.
From that post, it will not be allowed in Pathfinder Society - however, the FAQ gives GM's in anything non-PFS latitude to allow the mix.

It is not allowed, Crossblooded modifies the class bonus feat list, and Tattooed replaces one of the bonus feats, regardless of how Crossblooded works with the bloodline powers, this should be reason enough that they are not compatible.

We don't need to FAQ it, because it's already been FAQ'd via the crossblooded/wildblooded ruling. The important thing to note is that crossblooded replaces all of the bloodline abilities - therefore crossblooded doesn't stack with any archetype that replaces any bloodline ability.

This doesn't need to be determined for every single archetype. The logic from the first FAQ works for determining legality for every archetype with crossblooded.

I originally thought it did because tattooed replaces features that cross-blooded changes. However, the argument that they don't mix is relatively strong. Considering how often this comes up I would like to see some kind of answer.

It is pretty powerful, 5d4+10 burning hands at level 1 nukes many encounters, and a 1 level dip for wizard/arcanist can actually increase casting level (assuming magical knack) and add a lot of kick to their casting. I'm not saying its op (though it may be), just pointing out the archetype is especially powerful, especially for dipping.